Well surprise, surprise, they're now looking at the battery charging circuit.
It was drilled into us early doors on the Tristar and DC 10 that one of the worst malfunctions was thermal runaway of batteries caused by a malfunctioning battery charger.
I don't blame Boeing for going for the easiest option, but (from this distance) I always thought that it looked just like thermal runaway - symptoms fitted perfectly. Sadly, not as cheap a fix as a different battery - unless of course the battery charger is controlled by software.
Last edited by Dengue_Dude; 28th January 2013 at 20:17.